I read somewhere that it all depends on situations that you are male or female. Let take turtles or even crocs if he eggs are too warm they stay female and if they are cooler male.
Same could be said about babies. It all depends on what is happening with the mother. Stress, environment, addiction, etc.
Human are social being and way back they were not so up tight with sexuality has we are in North America or Religious Institutions. When a human needs comfort they will get it. It is a animal urge to be close, a human urge. If you spend all your time with a group you start wanting the group(I know I am opening another bag of beans) but it is true. Jails guys will do guys, women,women because of the sense and need for touch.
I feel each the environment and Biological Play rolls. We keep for getting that we are animals. Also the question is never stated
" Why be Straight" or " Is there an imbalance with our genes when you are born straight? We always seem to isolate gays or bi
People will conform to the group eg. religion, who say that gays and bi etc are the outsiders but why not the other way round. I don't communicate well in writing but you just need to think a bit.
Time for the gym.